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Product Name: Sodium Hydrogen Sulfite
Synonyms: Sodium bisulfite, Sodium acid sulfite
CAS Number: 7631-90-5
Recommended Use: Water treatment, bleaching, chemical synthesis
Manufacturer: Chemical suppliers or manufacturers serving industrial markets
Emergency Phone: Refer to national poison control or emergency chemical hotlines
Hazard Classification: Classified as hazardous, causes skin and eye irritation, respiratory issues after inhalation
Main Hazards: Breathing dust or vapor triggers asthmatic responses, contact irritates skin and mucous membranes
Signal Word: Warning
Hazard Statements: May cause respiratory irritation, prolonged exposure brings risk of developing chronic effects
Precautionary Statements: Avoid breathing dust or mist, use only outdoors or in ventilated areas, wear protective gear
GHS Pictograms: Exclamation mark
Chemical Name: Sodium Hydrogen Sulfite
Purity: Generally 98-100% depending on grade
Other Components: Small quantities of sodium sulfite or other related compounds, any impurities do not normally alter hazard profile
Inhalation: Remove to fresh air, seek medical help if breathing feels hard or symptoms persist
Skin Contact: Rinse with plenty of water using no abrasives, get medical aid for persistent irritation
Eye Contact: Rinse cautiously with water for minutes, remove contact lenses if present, get medical attention
Ingestion: Rinse mouth with water, do not induce vomiting, seek prompt medical care
Most Important Symptoms: Trouble breathing, skin redness, coughing, throat irritation
Suitable Extinguishing Media: Use water spray, foam, dry chemical, or carbon dioxide
Specific Hazards: Releases sulfur dioxide gas at high temperatures, intensifies breathing risk
Fire Fighters’ Advice: Wear self-contained breathing gear and protective clothing, cool containers with water spray
Combustion Products: Main product is sulfur oxides, which worsen respiratory hazards
Personal Precautions: Wear gloves, goggles, dust mask, avoid raising dust in confined areas
Spill Cleanup: Sweep product carefully to avoid dust clouds, collect and place in labeled waste container
Environmental Precautions: Keep out of sewers, drains, water supplies, runoff brings aquatic impact
Handling: Work with product in ventilated areas, avoid direct inhalation or skin contact, don’t eat or drink in work zones
Storage Conditions: Store in tightly closed containers, dry, well-ventilated places, away from acids, keep bags off floors and protected from moisture
Incompatible Materials: Acids, oxidizers, moisture accelerates decomposition
Engineering Controls: Local exhaust fans, dust extraction hoods tackle airborne particles
Personal Protective Equipment: Safety goggles, chemical-resistant gloves, protective clothing, NIOSH-approved dust respirator
Exposure Limits: OSHA and ACGIH recommend airborne exposure limits, usually 5 mg/m³ (TWA)
Hygiene Measures: Wash after handling, launder work clothes separately
Appearance: White crystalline powder
Odor: Faint sulfurous smell
pH (aqueous solution): Slightly acidic, usually between 4-5
Melting Point: Decomposes around 150°C
Solubility: Easily dissolves in water
Density: Roughly 1.48 g/cm³
Vapor Pressure: Negligible under normal conditions
Other Info: Solid material, does not burn
Chemical Stability: Stable in cool, dry, well-sealed containers
Conditions to Avoid: Moisture, heat, acids accelerate breakdown and gas release
Reactivity: Contact with acids releases sulfur dioxide, a choking gas
Incompatible Materials: Strong acids, oxidizing agents, moisture triggers decomposition
Hazardous Decomposition: Sulfur dioxide, sodium sulfite, and possibly sodium sulfate if heated
Acute Effects: Causes irritation to eyes, skin, and lungs; ingestion brings nausea and abdominal trouble
Chronic Effects: May worsen asthma, repeated inhalation heightens respiratory symptom risk
Sensitization: Can trigger allergic-type responses in sensitive people
LD50 (oral, rat): Roughly 820 mg/kg
Additional Notes: Pre-existing lung or allergy issues increase sensitivity
Aquatic Toxicity: Decomposes in water, lowers oxygen, endangering aquatic life
Persistence and Degradability: Reacts in the environment, transforms into sulfate forms over time
Bioaccumulation: Does not build up in food chains
Other Environmental Risks: Spills raise local acidity, harm fish and aquatic invertebrates
Waste Disposal Methods: Contain and collect residues for disposal as hazardous waste, follow local regulations
Packaging Disposal: Dispose of emptied containers properly, do not reuse
Additional Information: Never pour into drains, surface water, or natural environments
UN Number: 2693
Proper Shipping Name: Sodium bisulfite
Transport Hazard Class: 8 (Corrosive substances)
Packing Group: III
Special Precautions: Secure containers, avoid damage that releases dust
Marine Pollutant: Classified as hazardous to water under international rules
Labeling Requirements: GHS, OSHA, EPA, and other local standards apply according to region
Chemical Inventory Listings: On major registries such as TSCA, EINECS, AICS
SARA 313: Listed as reportable where applicable
Workplace Safety Standards: Refer to OSHA, NIOSH, and local occupational exposure rules
Other Compliance: Check local, state, and federal requirements for hazardous chemicals
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
